php - foreach 循环中的 str_replace 错误

Question

我在 php 中的小文本转笑脸/表情符号函数时遇到问题，该函数基于 str_replace 。这是我的代码。

$smileys = array( ":inlove:" => "/smileys/smiley2.png",
                      ":cool:" => "/smileys/smiley3.png",
                      ":tongue:" => "/smileys/smiley4.png",
                      ":wow:" => "/smileys/smiley5.png",
                      ":smile:" => "/smileys/smiley15.png",
                      ":happy:" => "/smileys/smiley6.png",
                      ":funny:" => "/smileys/smiley7.png",
                      ":wink:" => "/smileys/smiley8.png",
                      ":worried:" => "/smileys/smiley10.png",
                      ":pokerface:" => "/smileys/smiley9.png",
                      ":poop:" => "/smileys/smiley12.png",
                      ":thinking:" => "/smileys/35_thinking.png",
                      ":triumph:" => "/smileys/49_triumph.png",
                      ":vulcan:" => "/smileys/109_vulcan.png",
                      ":pointup:" => "/smileys/102_point_up_2.png",
                      ":santa:" => "/smileys/135_santa.png",
                      ":spy:" => "/smileys/134_spy.png");

if(isset($_POST['message'])) {
    $messagePlain = $_POST['message'];
    $messageSmileys = $messagePlain;

    foreach($smileys as $key => $img) {
        $messageSmileys = str_replace($key, '<img src="' . $img . '" />', $messageSmileys);
    }

    $connection->query(// Message to db);
}

效果很好。但问题是，当用户连续输入超过 14 个表情符号时，HTML 就会被破坏，如下所示:

HTML 源代码如下:

<div class="media-body">
                            <h4 class="media-heading">test <small>07. August. 2017 01:34</small></h4>
                             <img src="/smileys/smiley2.png" /> <img src="/smileys/smiley3.png" /> <img src="/smileys/smiley5.png" /> <img src="/smileys/smiley4.png" /> <img src="/smileys/smiley15.png" /> <img src="/smileys/smiley6.png" /> <img src="/smileys/smiley7.png" /> <img src="/smileys/smiley8.png" /> <img src="/smileys/smiley10.png" /> <img src="/smileys/smiley9.png" /> <img src="/smileys/smiley12.png" /> <img src="/smileys/49_triumph.png" /> <img src="/smileys/109_vulcan.png" /> <img src="/smileys/102_point_up_2.p                            </div>
</div>

有人可以帮我解决这个问题吗？为什么 HTML 标签是 <img>突然毁掉了？

Answer 1

查看你的输出:

<img src="/smileys/smiley2.png" /> <img src="/smileys/smiley3.png" /> <img src="/smileys/smiley5.png" /> <img src="/smileys/smiley4.png" /> <img src="/smileys/smiley15.png" /> <img src="/smileys/smiley6.png" /> <img src="/smileys/smiley7.png" /> <img src="/smileys/smiley8.png" /> <img src="/smileys/smiley10.png" /> <img src="/smileys/smiley9.png" /> <img src="/smileys/smiley12.png" /> <img src="/smileys/49_triumph.png" /> <img src="/smileys/109_vulcan.png" /> <img src="/smileys/102_point_up_2.p

上述字符串的长度为 499 个字符。我坚信数据库表中的 message 字段限制为 500 个字符或其他字符，并且输出会被截断为这些位。

解决方案/建议

如果您使用 MySQL 数据库服务器，我强烈建议您将数据库类型从 VARCHAR(500) 更改为 TEXT 或 LONGTEXT .